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Finding the Fourth Proportional to 987.80, 1,482.30 and 555.26

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Solution

The fourth proportional to 987.80, 1,482.30 and 555.26 is: 833.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.80 : 1,482.30 = 555.26 : x
  2. Step 2: Convert to fraction form
    987.80/1,482.30 = 555.26/x
  3. Step 3: Cross multiply
    987.80x = 1,482.30 × 555.26
  4. Step 4: Simplify right side
    987.80x = 823,054.49
  5. Step 5: Solve for x
    x = 823,054.49/987.80
  6. Step 6: Final answer
    x = 833.22

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.